Improvement in lamp-burners



. R. s. MERRILL.

Lamp Burner. A No.- 111,074. Patented Jan 17, 1871.

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WILLIAM B. MERRILL, AND JOSHUA MlfllRRILL, OF SAME PLAUF.

Letters Patent No. 111,674,1l3ted January 17, 1871.

lMPR OVENlENT IN LAMP-BURNERS.

The Schedule referred to in these Letters Patent and making part of the same.

7 To whom. it may concern:

Be it known thatLRUFUs S. MERRILL, of Boston, in the county of Suii'olk and State of Massachusetts, have invented certain new and useful Improvements in Argand or Round-wick Burners,- of which the following is a specification.

My iuvcntiong' relates .to that class of, Argand or round-wick burners inwhich a series of ratchets or equivalent devices are employed to raise the-wick; and

I It consists- First, in the arrangement of a chamber or case surroundin g the wick-tubes and inclosing the wickrraisiing devices in such manner that it shall serve to dividcor separate from each other the two draughts or currents of air which enter the burner, the one passing'to the exterior and the other to the interior of the flame.

Second, in the combination, with the exterior wicktubc, of the interior wick-tube, provided with a longitudinal fin by means of which it is attached and secured 'in proper position in relation tothc exterior tuber Third, in forming the base of the removable part of burner of a perforated plate, the outer edges of which are bent down at an angle with the remainder of the plate, so that when the said portion of the burner is in position the air which forms the exterior draught inust passthrough two sets of perforations at angles with one another before reaching the flame.

The manner in which my invention is or may be carried into effect will be "understood by reference to the accompanying drawing, in which- Figure 1 is a vertical central section of a burner made in accordance with m y invention.

Figure 2 is a plan view of the same.

Figure 3 is a view of the inner wick-tube, detached from the burner.

a is the outer, and

b, the inner wick-tube.

The two are united together by means'of a fin, c, on the inner tube, which extends nearly the length of the two tubes, and is soldered to the outer tube.

At or near the bottom of the inner tube is a horizontal tube 11, the open end of which is soldered to the outer tube, in which an opening ofeorrespolnling size is formed.

I prefer to closc-thcbottom of the inner tube 1) in. order to prevent all possible interference of the oil in the reservoir with .the central -draught, and I make a small peribration in the bottom of the tube, so as to allow whatever oil may gather there to run back into the'reservoir.

In this lamp aflat wick is used, which, before being put into the. lamp, is bent so as to bring its edges nearly together, and is then inserted in the lower end of the burner bctween the two tubes, the edges of the wick passing up around the air-conduit "t1, and on opposite sides of the fin c. In order to facilitate the insertion of the wick, I prefer to make the lower end of the outer wick-tube flaring, although'this is not abso lately necessary.

The wick-raising device is composed of .ratchetwheels '0, like those employed with flat-wick burners, arranged around the wick so as to grasp it simultaneously at'four or more points, according to the number of wheels employed. In this instance, I use four wheels, arranged in pairs on shafts placed on opposite sides of the wick-tube. I

The shafts are mounted in suitable hearings in the burner, and are operated by means of a spindle or button, f, from the outside or the burner, motion being imparted from the one shaft to the other by means of gear or toothed wheels g, as shown in figs. 1 and 2.

The wick-raising wheels are incloscd in a case or chamber, '71, which is of sufficient capacity to receive,

not only theratchet-whcels, but also the gears g. This chamber serves also to divide the air into two currents or draughts. The inner or central draught can be takeueithr below or through the chamber 71..

Vhcn taken below the chamber, it enters through perforations i, and thence passes under the bottom of the said chamber, through the tube ll, and into the central tubeb. I

Perforations for the same purpose may, however,

be formed in the sides of instead of below the chamber, and in this case it is quite necessary to have above the point where the perforations are made, a cap or cover, It, for the chamber, or an equivalent divisionplate, which, when the parts of the burner are put together, will serve to divide the lower from the 11pper draught.

I prefer, however, whether the central draught be taken below or through thechambcr, to provide the latter with a cap or cover, which is dished or depressed aroundthe wick-tube, as shown in fig. 1, so as to catch the oil which may run down the exterior of the tube. This oil runs down into the chamber h through a small hole, Z, and thence finds its way back to the oil-reservoir through a hole, 012,01 other suitable outlet.

The upper part of the burner, consisting of the ehimncy-rest and springs, is made removable, so that it, together with the chimney which it carries, maybe readily removed from or fitted to the burner. To this end, the chimney-rest or base a of the removable part of the burner is secured to a sleeve, 0,'which fits the outer wick-tube (ans seen in fi 1. The removable part of the burner, which isthus steadied and held in proper position, rests upon the top of the chamber h. The base n is formed of a perforated plate, the outer portion, at, of which is bent down at angles with the, horizontal portion, and the air which forms the exterior draught must pass first through thepcrforation n, and then, changing direction, through the perforations at, before it can reach the flame. By thus passing through two sets of perforations, at angles with each other, the current of air is finely divided and equalized, and the flame is rendered more steady.

In conclusion, I would state that I do not, broadly, claim dividing the air which enters'the burner into exterior and interior draughts; nor do I claim the employment for this purpose of aipartition, floor, or plate,

arranged upon the exterior of the wick tubes; but

Having now described my invention, and the manner in which the same is, or may be, carried into effect, What I claim, and desire to secure by Letters Pat ent, is

1. The combination, with the inner and outer wicktnbes of an Argand burner and the ratchet-s or other wick-raising devices arranged upon the exterior of the said tubes, of a chamber or case, inclosing the said ratchets or other wick-raising devices, and separating the exterior draught from the central draught, substantiaiiy as herein shown and described.

2. The inner and outer wick-tubes, united by means of a'iongitudinal fin or strip ext-ending the whole or nearlythe whole length of said tubes, as described, and

\Vitnesses M. BAILEY, Emu, F. Bnows.

combined with atube or conduit for conveying the 

